Sahih Muslim Book 31, Hadith Number 6012.
Chapter : The merits of Umm Sulaim, the mother of Anas b. Malik and Bilal (Allah be pleased with both of them).
Jabir b. ‘Abdullah reported: I was shown Paradise and I saw the wife of Abu Talha (i.e. Umm Sulaim) and I heard the noise of steps before me and, lo, it was that of Bilal.